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I am trying to connect external fingerprint scanner to the Android application which is in Kiosk mode(Android COSU). A system dialog should be displayed to ask for the permissions in order to access the fingerprint scanner. However, In kiosk mode, I cannot see any System dialogs showing up. Is there a way where I can display system dialogs in Kiosk mode?

Edit: I am able to access Runtime permission dialogs but not Finer print authentication dialog. So, I guess there is some issue only with the USB permission dialog.

karthikeya koppuravuri
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  • Hi, would it solve your problem if you could grant the permission without showing the dialog at all? If yes then you can try [DevicePolicyManager.setPermissionGrantState](https://developer.android.com/reference/android/app/admin/DevicePolicyManager.html) or [PermissionGrant](https://developers.google.com/android/management/reference/rest/v1/enterprises.policies#PermissionGrant) if you use the Android Management API. – Fred Sep 17 '17 at 21:21
  • @Fred: I have used DevicePolicyManager.serPermissionGrantState to assign permission to android.permission.MANAGE_USB. I cannot initialize fingerprint scanner yet as it is still expecting a permission. Could you please mention what is the exact string for USB Permission? Do I need to mention Vendor and Product id anywhere? – karthikeya koppuravuri Sep 18 '17 at 07:39
  • The required permission should be in the manifest of the APK requiring it. You can list the permissions used by an APK using `aapt d permissions myapk.apk` (see [this answer](https://android.stackexchange.com/questions/9775/read-apk-permission-by-shell-command)). – Fred Sep 18 '17 at 12:16
  • karthikeya koppuravuri, did you resolve the problem? if yes, could you give me the solution, or show the way to solve it? – Bakhrom Achilov May 16 '18 at 08:26

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